Coral cultivation method, manufacturing method for coral-growth substrate precipitated with electrodeposited minerals, and coral-growth substrate

Abstract

A coral cultivation method includes: an electrodeposited-mineral precipitating procedure for precipitating electrodeposited minerals on a coral-growth substrate for growing coral, which is placed in seawater, by applying an electric current between the coral-growth substrate and a first anode that is electrically connected to the coral-growth substrate and placed in the seawater; a coral-larvae growing procedure for growing coral larvae on the coral-growth substrate precipitated with the electrodeposited minerals; a coral-cultivation-structure configuring procedure for configuring a coral cultivation structure from a plurality of the coral-growth substrates on which the coral larvae are grown; and a coral cultivating procedure for cultivating coral by applying an electric current between the coral-growth substrate on which the coral larvae are grown and a second anode.

The invention claimed is: 
     
       1. A coral cultivation method comprising:
 placing a coral-growth substrate in seawater; 
 electrically connecting a first anode to the coral-growth substrate; 
 precipitating an electrodeposited-mineral on the coral-growth substrate by applying a first current density to the coral-growth substrate via the first anode; 
 growing a coral-larvae on the coral-growth substrate after precipitating the electrodeposited-mineral; 
 electrically connecting a second anode to the coral-growth substrate after growing; and 
 cultivating a coral by applying a second current density to the coral-growth substrate via the second anode, wherein 
 the first current density is greater than the second current density. 
 
     
     
       2. The coral cultivation method according to  claim 1 , wherein, after the growing of a coral-larvae, a coral-cultivation-structure configuring procedure for configuring a coral cultivation structure from a plurality of the coral-growth substrates on which the coral larvae are grown is performed, and thereafter the cultivating is performed. 
     
     
       3. The coral cultivation method according to  claim 1 , wherein an electrode having a self-potential lower than that of the coral-growth substrate is used as the first anode. 
     
     
       4. The coral cultivation method according to  claim 1 , wherein aluminum alloy or magnesium alloy is used as the first anode. 
     
     
       5. The coral cultivation method according to  claim 1 , wherein an electrode having a self-potential lower than that of the coral-growth substrate is used as the second anode. 
     
     
       6. The coral cultivation method according to  claim 1 , wherein aluminum alloy or magnesium alloy is used as the second anode. 
     
     
       7. The coral cultivation method according to  claim 1 , wherein the precipitating the electrodeposited-mineral includes applying the first current density by using a power source.